Rotary valve



July 20, 1943. I Q A. G. GURRI'ES ROTARY VALVE INVENTOR H. GGurrLes I5 Sheets-Sheet 2 Filed 001;. 10, 1941 July 20, 1943. A. G. GURRIES 2,324,576

ROTARY VALVE Filed on. 10, 1941 f s Sheds-Sheet 5 I, {I Zr/gig; 22 15 22 mix FM A 7 INVENTOR .H.G.Gurrie5 Patented July 20, 1943 UNITED "STATES PATENT orms ROTARY vAivE f Albert Gurriea ICaliif. "Application ot0ber10, 194i,s na1N04143:?

This invention relates to a rotary valve, and particularly .to one adapted for high pressure (service to control the flowof oil or similar fluid from a sourceof pressure to a hydraulic cylinder rotor between through with minimum ofx-restriction and thus avoid: the excessive heating of: the. oil which is detrimental to :the oil .itself :and to any. hose through: which the oil may flow after leaving thevalve. w] m; l c" A further object of the invention is to produce a simple. and inexpensive device and yet one pose for whichit-is desi ned;

which will be exceedingly effective for the pur- These objects 'I accomplish by means oflsuch structure and relative arrangement of :partsas will fully appear by a perusal of specification and-claims;

In the drawings similar characters of reference indicate corresponding parts in the several views:

Figure l is a sectional elevation of the valve, showing the rotor in the holding position.

Figure 2 is an end view of the valve, showing the control handle.

Figure 3 is a transverse section on line 3 -3 of Fig; 1 and showing the valve as mounted on a.

pump.

Figures 4 and 5 are transverse sections of the valve showing the rotor in feed-and-release and floating positions respectively. g

Figure 6 is a detached elevation of the valve rotor.

Referring now more particularly to the characters of reference on the drawings, the valve comprises a body I having a cylindrical bore 2, and closed at one end by a plate 3 and at the other end by a cupped head 4. The valve rotor 5 is turnable in bore 2 and is shorter than the bore, leaving a chamber ii in the body between the rotor and end plate 3. which is closed bythe adjacent end of the rotor. The rotor is formed with end stub shafts l and8 of reduced size.

the following Zillaims, (Cl. es gissifjj.

The rotor sis'provided with a diametral pas- :sage "l l. having"circumferentially spaced branches Ha atone end, 'a peripheral port. 1 2 between branches lid leading to chamber li es shown in Fig. and opposed side peripheral ports .1 3. and

M :betweenbranches Ha and, the opposed end'of port I l and-alsoleading to chamber 6. Bleed communication is also provided between one :or more of these portsand' the 'capd, as indicated in-Fig.1, to equalize the pressure as well as to lubricatethe adjacent rotor bearing Iila.

The body. has an: intake passage 15 leading to bore 2 to alwayscommunicate with passage [I and with the discharge passage I 6 of the pressure gear pump ll on top of which the valve body ismounted, opposed side passages l8 and I9 also leading togthebore-Z .to communicate alternately witlrbranch passages ;I la and ports l3. and i4,

"and other circumferentially. spaced passages 2i! disposed symmetrically between passages l8 and m1 and leading toajunction at the top of the valve; body, .thegspacing of passages 2 0.at bore 2 being the same as that. of branches Ila.

. l Chamberfiisprovided withv ports 2%. exposed to theater) ofthe body in. transversely spaced relation to passages 28, and also has bottom ports 22' communicating with the intake passages 23 of thepump and which lead to a common termination between the gears of the pump in opposed relation to the discharge passage l6.

It should be noted that while chamber 6 is beyond the rotor, the ports 2! and 22 are alined with the rotor communicating passages i5 and 26; this arrangement being obtained by suitably passaging the body between the chamber and said ports as indicated by dotted lines in Fig. 1.

An oil supply reservoir 24 is mounted on top of the valve body, said reservoir being formed with a passage 25 establishing permanent communication between passage and ports 2|. The top wall of the passage is provided with bleed openings 26. a

' In operation, when the rotor is disposed in the holding position shownin Fig. 3, passages l8 and Shaft 1 projects through head 4 and has an operating handle 9 thereon, while shaft 8 terminates inside plate 3 and is engaged by a ball bearing Ii! disposed so as not to obstruct chamber6.

[9 (which lead to and from thehydraulic unit being controlled) are shut off, ports [2, I3 and I4 are likewise shut oif, and passages 2!) and I la are in full register, as well as passages II and i5. No

oil can therefore enter or leave the hydraulic unit,

and will return to the pump from said unit through passage l9, port l4 and chamber 6. The other branch I la is shut off, while port I2 is open to passage to supply additional oil to the pump through chamber 6, should it be needed.

If the valve is turned in the opposite direction, oil is fed into passage l9 and returned to the pump from passage I8, as will be obvious.

When the valve rotor is fruther turned to the floating position shown in Fig. 5, oil can circulate from the pump through the valve and back to the pump; through passage ll, one of the branches H a, one of passages 20 and and thence through chamber 6. The oil can also pass through port l3 directly to chamber 6. At the same time, port I 2 is in communication with passage l8, allowing return of oil from the hydraulic unit into chamber 6, while passage I9 is in communication with port l4, which is also in communication with the other passage 20 as well as with chamber 6 direct. The hydraulic mechanism is thus free to float or to be moved by an outside force.

The various positions of the rotor as above described are obtained with a relatively small. arcuate movement of the rotor (approximately between each position, by reason of the specific passaging and porting arrangement used, and particularly chamber 6 and the various rotor ports communicating therewith. At the same time, the passages are large and the high pressure oil can flow through the valve with a minimum of friction and resistance, so that overheating is avoided.

Locating means for the different positions of the rotor is provided in the form of a spring pressed ball 21 mounted in a socket 28 clamped on shaft 1 within the head 4; the ball successively engaging depressions 29 in the bore of the head upon turning of the rotor to its different positions. Turning of the rotor is positively limited by stop lugs 30 on the outside of the head projecting into the path of handle 9. I

From the foregoing description it will be readily seen that I have produced such a device as substantially fulfills the objects of the invention as set forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described my invention, what I claim as new and useful and desire to secure by Letters Patent is: I

1. A rotary valve comprising a body having a cylindrical bore and a chamber beyond one end of the bore, a valve rotor turnable in the bore and at one end forming an end wall of the chamber, opposed passages in the body leading from the bore for connection with opposite ends of a hydraulic unit, a pressure intake passage in the body leading to the bore from one exterior face of the body and an outlet passage in the body leading from the chamber to a termination at said face in alinement with the adjacent end of the intake passage transversely of the rotor; Said rotor being passaged and ported to establish communication in predetermined order between the various body passages. 1 2. A rotary valve comprising a body having a cylindrical bore and a chamber beyond one end of the bore, a valve rotor turnable in the 'bore and at one end forming an end wall of the chamber, opposed passages in the body leading from the bore for connection with opposite ends of a hydraulic unit, a pressure intake passage in the body leading to the bore from one exterior face of the body and an outlet passage in the body leading from the chamber to atermination at' ALBERT G. GURRIES. 

